/*
 * Created on Mar 21, 2013
 * Created by Paul Gardner
 * 
 * Copyright 2013 Azureus Software, Inc.  All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License only.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

package com.aelitis.azureus.core.tag.impl;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.gudy.azureus2.core3.util.Debug;

import com.aelitis.azureus.core.tag.TagException;
import com.aelitis.azureus.core.tag.Taggable;
import com.aelitis.azureus.core.util.CopyOnWriteSet;
import com.aelitis.azureus.util.MapUtils;

public abstract class TagWithState extends TagBase {
    private CopyOnWriteSet<Taggable> objects = new CopyOnWriteSet<Taggable>(true);

    private boolean removed;

    public TagWithState(TagTypeBase tt, int tag_id, String name) {
        super(tt, tag_id, name);
    }

    protected TagWithState(TagTypeBase tt, int tag_id, Map map) {
        super(tt, tag_id, MapUtils.getMapString(map, "n", ""));

        if (map != null) {

            List<byte[]> list = (List<byte[]>) map.get("o");

            if (list != null) {

                for (byte[] b : list) {

                    try {
                        String id = new String(b, "UTF-8");

                        Taggable taggable = tt.resolveTaggable(id);

                        if (taggable != null) {

                            objects.add(taggable);
                        }
                    } catch (Throwable e) {

                        Debug.out(e);
                    }
                }
            }
        }
    }

    protected void exportDetails(Map map, boolean do_contents) {
        MapUtils.setMapString(map, "n", getTagNameRaw());

        if (do_contents) {

            Iterator<Taggable> it = objects.iterator();

            List<byte[]> l = new ArrayList<byte[]>(objects.size());

            while (it.hasNext()) {

                try {
                    Taggable taggable = it.next();

                    String id = taggable.getTaggableID();

                    if (id != null) {

                        l.add(id.getBytes("UTF-8"));

                    } else {

                        Debug.out("No taggable ID for " + taggable);
                    }
                } catch (Throwable e) {

                    Debug.out(e);
                }
            }

            map.put("o", l);
        }
    }

    public void setTagName(String name)

    throws TagException {
        super.setTagName(name);

        getManager().tagChanged(this);
    }

    public void addTaggable(Taggable t) {
        if (removed) {

            Debug.out("Tag has been removed");

            return;
        }

        objects.add(t);

        super.addTaggable(t);

        getManager().tagContentsChanged(this);
    }

    public void removeTaggable(Taggable t) {
        boolean removed = objects.remove(t);

        super.removeTaggable(t);

        if (removed) {

            getManager().tagContentsChanged(this);
        }
    }

    @Override
    public void removeTag() {
        super.removeTag();

        removed = true;
    }

    protected boolean isRemoved() {
        return (removed);
    }

    public int getTaggedCount() {
        return (objects.size());
    }

    public boolean hasTaggable(Taggable t) {
        return (objects.contains(t));
    }

    public Set<Taggable> getTagged() {
        return (objects.getSet());
    }
}
